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The paper deals with the problems of computing the intervals of possible values of the latest starting times and floats of activities in networks with imprecise durations, represented by means of interval or fuzzy numbers. So far, these problems have been completely solved when the networks are series parallel. We propose new polynomial algorithms for determining the intervals of the latest starting...
Complexity results for problems of evaluating the criticality of activities in planar networks with duration time intervals are presented. We show that the problems of asserting whether an activity is possibly critical, and of computing bounds on the float of an activity in these networks are NP-complete and NP-hard, respectively.
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